Jeep has approximately 49000 miles on it.
3.8L V6, (from old 3.3l ) OHV ,push rod simple )
same car as one of mine, same engine, mine is 08
p0300 means all 6 cylinders fail or combustion pressure, weak.
at random.
so not 6 bad spark plugs news and gaped to speck
so is bad fuel?
so is 6 clogged injectors,, NO.
hot engine has normal idle rpm 800 or screams only.
yes that is called gross misfire and lost of engine power too you forgot to say.
got AF radiator water in the oil pan , looks like like chocolate milk?
mine has 100k runs like new, water pump only failure ever, 100k miles me.
seems like bad fuel to me. ,diesel put in to gasoline tank?
the only weakness this motor I know is 2.
1:lower manifold gasket leaks and AF coolant falls to top of engine and down.
replace coolant every 5years is win to avoid that.
2: egr failure sticking open and a pain to reach, unless right finder pulled fully
im sure compression tests pass at 150psi up. sure. 50k miles how can it fail.?
make sure at AM dead cold engine, rad cap off rad neck is 100% full of AF.
never let it drop, and keep side tank 1/2 full cold.
never forget to burp the coolant here as you replace it all
as you fill it up.(AF antifreeze coolant)
hose off here, heater)
fill rad until it leaks here
hose back
then fill rad full to top of neck.
https://drive.proton.me/urls/2AJBWHFE3R#n9DXuC8sIcOD
link is new pump installed steps PDF
SOURCE: Jeep Hesitates. P0303 code
Check the cylinders Commpression. over 115 psi is good, 120 psi is normal.
SOURCE: 2002 Jeep Grand Cherokee Lardo misfiring
You say you changed the cam sensor. A1391 code is a crank sensor on the top of the trans. bell housing.
SOURCE: 91 Jeep wrangler New everything idles rough, no Power then dies
you check for miss how is compression
SOURCE: Changing spark plug wires on 2001 Jeep Grand cherokee
yah direct ignition coil pack does away for the need a a distributer cap and rotor.much higher energy ignition system where the computer tell when to fire.if that helps.not hard to change.as long as you change them one at a time so you don't screw up the order.
SOURCE: Misfire problem... engine stumbles at idle
my jeep was misfiring and i changed the same parts you changed.... When you changed your crank sensor, did you get parts from the dealer? if not u should trying changing the crank senor part from tne dealer. After market parts do not work good on Jeeps I had to learn the hard way..
584 views
Usually answered in minutes!
Rick Simpkins, in the end what was the problem?
×